"Dragons!" There's a good chance that she might miss the explanation of just what a plane is, because dragons are really interesting. Or at least personally relevant. He's angling slightly forward, listening to her explanation. "Two-headed dragons, even! That's amazing." He is even forgetting to eat his donut. "That's not entirely fair, having to share a dragon, if everyone has one, I'd think... I mean, unless you like that." Weren't brothers and sisters supposed to fight over stuff like that?